PC817 Optocoupler / Optoisolator

This Optocoupler, also known as an optoisolator, is used to transfer electrical signals between 2 isolated circuits via light. Inside the optocoupler there is a photo-emitter and receiver that sends the signals from one circuit to the other. Useful for controlling large loads via microcontroller.

Use this optocoupler, aka optoisolator, to protect your microcontroller from being overdrawn and burning out. Place this optocoupler chip in between your microcontroller and the current drawing circuit to protect it.